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Piezoelectric Sensor to Measure Soft and Hard Stiffness with High Sensitivity for Ultrasonic Transducers.

Li YR, Su CC, Lin WJ, Chang SH - Sensors (Basel) (2015)

Bottom Line: Three sensor locations were also examined.Using sensor type T1 made of the PZT-1 material and the front location A1 provided a high sensitivity of 2.47 Vm/kN.The experimental results demonstrated that our design can measure soft and hard stiffness.

View Article: PubMed Central - PubMed

Affiliation: Department of Mechanical Engineering, National Taiwan University, Taipei 106, Taiwan. yanray_@hotmail.com.

ABSTRACT
During dental sinus lift surgery, it is important to monitor the thickness of the remaining maxilla to avoid perforating the sinus membrane. Therefore, a sensor should be integrated into ultrasonic dental tools to prevent undesirable damage. This paper presents a piezoelectric (PZT) sensor installed in an ultrasonic transducer to measure the stiffness of high and low materials. Four design types using three PZT ring materials and a split PZT for actuator and sensor ring materials were studied. Three sensor locations were also examined. The voltage signals of the sensor and the displacement of the actuator were analyzed to distinguish the low and high stiffness. Using sensor type T1 made of the PZT-1 material and the front location A1 provided a high sensitivity of 2.47 Vm/kN. The experimental results demonstrated that our design can measure soft and hard stiffness.

No MeSH data available.


Related in: MedlinePlus

Experimental set-up for measuring the longitudinal displacement of the actuator and the sensor voltage.
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sensors-15-13670-f004: Experimental set-up for measuring the longitudinal displacement of the actuator and the sensor voltage.

Mentions: A free vibration test, using the set-up shown in Figure 4, was conducted to examine the efficacies of the different sensor designs. The ultrasonic transducer was clamped at a hexagonal location of the horn. The driving signal was provided by a power amplifier (NF 4005) connected to the function generator (Agilent 33120A). The longitudinal displacement of the actuator and the sensor voltage of the sensor were obtained with a laser vibrometer (Polytec OFV-3000) and an oscilloscope (Tektronix TDS 5054), respectively. The longitudinal displacement and sensor voltage were measured under a driving voltage of 5 V using a dynamic signal analyzer (HP 35665). The results are shown in Figure 5. A clear peak of the displacement and sensor voltage appeared at a resonant frequency of 40 kHz. The observed sensor voltage was consistent with the displacement. The results showed good correlation between the displacement and the sensor voltage and indicated that the sensor voltage was able to react to the displacement accurately.


Piezoelectric Sensor to Measure Soft and Hard Stiffness with High Sensitivity for Ultrasonic Transducers.

Li YR, Su CC, Lin WJ, Chang SH - Sensors (Basel) (2015)

Experimental set-up for measuring the longitudinal displacement of the actuator and the sensor voltage.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4507687&req=5

sensors-15-13670-f004: Experimental set-up for measuring the longitudinal displacement of the actuator and the sensor voltage.
Mentions: A free vibration test, using the set-up shown in Figure 4, was conducted to examine the efficacies of the different sensor designs. The ultrasonic transducer was clamped at a hexagonal location of the horn. The driving signal was provided by a power amplifier (NF 4005) connected to the function generator (Agilent 33120A). The longitudinal displacement of the actuator and the sensor voltage of the sensor were obtained with a laser vibrometer (Polytec OFV-3000) and an oscilloscope (Tektronix TDS 5054), respectively. The longitudinal displacement and sensor voltage were measured under a driving voltage of 5 V using a dynamic signal analyzer (HP 35665). The results are shown in Figure 5. A clear peak of the displacement and sensor voltage appeared at a resonant frequency of 40 kHz. The observed sensor voltage was consistent with the displacement. The results showed good correlation between the displacement and the sensor voltage and indicated that the sensor voltage was able to react to the displacement accurately.

Bottom Line: Three sensor locations were also examined.Using sensor type T1 made of the PZT-1 material and the front location A1 provided a high sensitivity of 2.47 Vm/kN.The experimental results demonstrated that our design can measure soft and hard stiffness.

View Article: PubMed Central - PubMed

Affiliation: Department of Mechanical Engineering, National Taiwan University, Taipei 106, Taiwan. yanray_@hotmail.com.

ABSTRACT
During dental sinus lift surgery, it is important to monitor the thickness of the remaining maxilla to avoid perforating the sinus membrane. Therefore, a sensor should be integrated into ultrasonic dental tools to prevent undesirable damage. This paper presents a piezoelectric (PZT) sensor installed in an ultrasonic transducer to measure the stiffness of high and low materials. Four design types using three PZT ring materials and a split PZT for actuator and sensor ring materials were studied. Three sensor locations were also examined. The voltage signals of the sensor and the displacement of the actuator were analyzed to distinguish the low and high stiffness. Using sensor type T1 made of the PZT-1 material and the front location A1 provided a high sensitivity of 2.47 Vm/kN. The experimental results demonstrated that our design can measure soft and hard stiffness.

No MeSH data available.


Related in: MedlinePlus